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Finding the Third Proportional to 128,457 and 270,762.75

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Solution

The third proportional to 128,457 and 270,762.75 is: 570,716.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,457 : 270,762.75 = 270,762.75 : x
  2. Step 2: Convert to fraction form
    128,457/270,762.75 = 270,762.75/x
  3. Step 3: Cross multiply
    128,457x = 270,762.75 × 270,762.75
  4. Step 4: Simplify right side
    128,457x = 73,312,466,787.56
  5. Step 5: Solve for x
    x = 73,312,466,787.56/128,457
  6. Step 6: Final answer
    x = 570,716.01

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.